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After presenting a short history of gamma-ray burst (GRB) studies, we discuss the current constraints on GRB models which follows from astronomical observations. We concentrate on the energetics of the GRBs with known redshifts and the…

天体物理学 · 物理学 2007-05-23 K. A. Postnov

Gamma-ray bursts (GRBs) are a mixed class of sources consisting of, at least, the long duration and short-hard subclasses, the X-ray flashes, and the low-luminosity GRBs. In all cases, the release of enormous amounts of energy on a short…

天体物理学 · 物理学 2008-09-24 Charles D. Dermer , Chris L. Fryer

The correlation between distant Gamma-Ray Bursts (GRBs) and foreground galaxy clusters is re-examined by using the well localized (with an accuracy down to a few arcseconds) Swift/XRT GRBs. The galaxy clusters are compiled from both X-ray…

宇宙学与河外天体物理 · 物理学 2015-05-18 J. Wang , J. Y. Wei

Crosscorrelation of the outputs of two Gravitational Wave (GW) detectors has recently been proposed [1] as a method for detecting statistical association between GWs and Gamma Ray Bursts (GRBs). Unfortunately, the method can be effectively…

天体物理学 · 物理学 2009-11-07 G. Modestino , A. Moleti

Gamma-ray bursts (GRBs) are short and intense flashes at the cosmological distances, which are the most luminous explosions in the Universe. The high luminosities of GRBs make them detectable out to the edge of the visible universe. So,…

高能天体物理现象 · 物理学 2016-02-17 Patrick Petitjean , F. Y. Wang , X. F. Wu , J. J. Wei

Recent observational and theoretical results suggest that Short-duration Gamma-Ray Bursts (SGRBs) are originated by the merger of compact binary systems of two neutron stars or a neutron star and a black hole. The observation of SGRBs with…

宇宙学与河外天体物理 · 物理学 2013-04-10 Carlo Enrico Petrillo , Alexander Dietz , Marco Cavaglià

Understanding of the nature of gamma-ray bursts (GRBs) is one of the challenging problem facing the astrophysics community. The field of gamma ray bursts is a rapidly developing one and we expect that new missions, like SWIFT and GLAST will…

天体物理学 · 物理学 2008-11-26 A. Lazarian , V. Petrosian , H. Yan , J. Cho

The Gamma-Ray Bursts (GRBs) offer the unprecedented opportunity to observe for the first time the blackholic energy extracted by the vacuum polarization during the process of gravitational collapse to a black hole leading to the formation…

The traditional design of trigger algorithms for GRB experiments requires the specification of the background and burst samples in terms of acquisition times that are of fixed duration and of fixed elapsed time from each other. One such set…

天体物理学 · 物理学 2009-11-07 Carlo Graziani

Gamma-ray bursts (GRBs) have variable lightcurves. Although most models attribute the observed variability to one physical origin (e.g. central engine activity, clumpy circumburst medium, relativistic turbulence), some models invoke two…

高能天体物理现象 · 物理学 2015-05-27 He Gao , Bin-Bin Zhang , Bing Zhang

Gamma-Ray Bursts (GRBs) - short bursts of 100-1MeV photons arriving from random directions in the sky are probably the most relativistic objects discovered so far. Still, somehow they did not attract the attention of the relativistic…

广义相对论与量子宇宙学 · 物理学 2017-08-23 Tsvi Piran

Gamma-ray bursts (GRB) are short and intense bursts of $\sim$100 keV$-$1MeV photons, usually followed by long-lasting decaying afterglow emission in a wide range of electromagnetic wavelengths from radio to X-ray and, sometimes, even to GeV…

高能天体物理现象 · 物理学 2023-04-05 Yun-Wei Yu , He Gao , Fa-Yin Wang , Bin-Bin Zhang

It is known that some observed gamma-ray bursts (GRBs) are produced at cosmological distances and that the GRB production rate may follow the star formation rate. We model the BATSE-detected intensity distribution of long GRBs in order to…

天体物理学 · 物理学 2007-05-23 J. R. Lin , S. N. Zhang , T. P. Li

Gamma-ray bursts (GRBs) are divided into short gamma-ray bursts (SGRBs) and long gamma-ray bursts (LGRBs) based on the bimodal distribution of their durations. LGRBs and SGRBs are typically characterized by different statistical…

高能天体物理现象 · 物理学 2022-09-01 Yun Wang , Lu-Yao Jiang , Jia Ren

Gamma-ray bursts (GRBs) offer a powerful probe of the cosmic expansion history far beyond the redshift range accessible to Type Ia supernovae. However, the study of cosmological models using GRBs is hindered by the circularity problem,…

宇宙学与河外天体物理 · 物理学 2026-03-11 Nilanjana Bagchi Aurpa , Abha Dev Habib , Nisha Rani

Gamma-ray bursts (GRBs) are known to be the most violent explosions in the universe, and a variety of correlations between observable GRB properties have been proposed in literature, but none of these correlations is valid for both long…

高能天体物理现象 · 物理学 2020-06-24 Qi Guo , Da-Ming Wei , Yuan-Zhu Wang , Zhi-Ping Jin

A sizeable fraction of gamma-ray burst (GRB) light curves (LCs) features a sequence of peaks, which holds information on the unknown way energy is dissipated into gamma-rays over time. Traditional searches for periodic signals in GRB LCs…

We analyze the randomness of the sky distribution of cosmic gamma-ray bursts. These events are associated with massive galaxies, spiral or elliptical, and therefore their positions should trace the large-scale structure, which, in turn,…

宇宙学与河外天体物理 · 物理学 2010-09-21 O. V. Verkhodanov , V. V. Sokolov , M. L. Khabibullina , S. V. Karpov

The determination of distances is highly constrained to a small number of Gamma-Ray Bursts (GRBs) because it requires observations at different wavelengths. Some empirical functions to estimate redshifts have been identified using…

高能天体物理现象 · 物理学 2019-09-04 J. Rodrigo Sacahui , M. Antonio Morales , M. Magdalena González

Typical observational gamma-ray burst (GRB) spectra are discussed and, in this connection, what is the origin of the compactness problem and how it was solved at first. If the threshold for $e^{-}e^{+}$ pair production depends on an angle…